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toh:hp:laserjet1320 [2012/12/29 20:02]
toh:hp:laserjet1320 [2013/11/12 10:30] (current)
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 +====== Hewlett-Packard LaserJet 1320(n) ======
 +
 +To be more specific, what is described here, is the printer'​s mainboard, often called "​formatter board"​.
 +At least two different models are available:
 +
 +  * CB355: with USB & parallel port
 +  * CB356: with USB & RJ-45
 +
 +====== Model CB356 ======
 +
 +In the CB356 two systems are integrated on one board.
 +The primary system is the main printer driver, accessible via USB,
 +responsive to the reset switch and controlling all printer parts via dedicated (flat) cable sockets.
 +The secondary system is independent of the primary and only provides network functionalities,​ including a print server.
 +The systems interact only via an exposed interface, which looks like an unsoldered IDE connection,
 +it's not IDE though, rather for modularity or testpoints for the interaction.
 +May even be a parallel port, which is receiving input directly from the secondary system.
 +The latter idea is rather probable, since this allows using the same primary system for both, CB355 and CB356.
 +
 +{{http://​wiki.matthiasbock.net/​images/​thumb/​HP_CB356_board_layout.svg/​120px-HP_CB356_board_layout.svg.png}}
 +
 +^ Serial console || 2x | both systems have it |
 +^ JTAG || 2x | both systems have it, system 1: P1+P2, system 2: P3 |
 +
 +===== Primary system: Printer driver =====
 +
 +^ SoC 1 || Motorola/​Freescale ColdFire 4: 133 MHz MIPS | 1825-0104 SC414445VM DD11448; main printer driver: [[http://​www.freescale.com/​webapp/​sps/​site/​homepage.jsp?​code=PC68KCF|online resources]] |
 +^ ROM (firmware) || 4 MB MASK ROM | Macronix MX23L3213TC-90G,​ CB355-60203:​ [[http://​www.alldatasheet.com/​datasheet-pdf/​pdf/​142783/​MCNIX/​MX23L3213TC-90G.html|datasheet]] |
 +^ RAM || 16 MB SDRAM | 48LC8M16A2: [[http://​www.scribd.com/​doc/​64866084/​SDRAM-48LC8M16A2-Datasheet|datasheet]] |
 +^ RAM expansion slot || max. 128 MB | 100-pin DIMM with SDRAM required, e.g. [[http://​www.itniederrheinshop.de/​Printer-Parts/​HP/​LaserJet/​HP-LaserJet-1320/​HP-Hewlett-Packard-32MB-100-pin-SDRAM-DIMM-memory-module.html|64ms refresh, 100MHz operating frequency]] |
 +^ EEPROM || 64k | 24LC641: I²C-driven,​ [[http://​de.farnell.com/​microchip/​24lc64-i-sn/​eeprom-serial-64k-24lc64-soic8/​dp/​9758070|datasheet]] |
 +^ LEDs || LED blink driver | Philips PCA9551, I²C-driven |
 +^ other || octal latch | Philips LVC573A: [[http://​www.datasheetcatalog.org/​datasheet/​philips/​74LVC573APW.pdf|datasheet]] |
 +^ USB || yes | 1x host |
 +^ Parallel port || yes(?) | 1x onboard, functions as hardconnected I/O port to the secondary system and secondary system'​s serial console |
 +
 +===== Secondary system: Print server =====
 +
 +^ SoC 2 || ARM? | Philips ARM VY22566-3 1825-0084 |
 +^ LAN || 10/100 | Broadcom BCM5231A4KPTG-P14 |
 +^ Flash (firmware) || 4 MB | Spansion AM29LV320DB-90ED:​ [[http://​www.alldatasheet.com/​datasheet-pdf/​pdf/​163405/​SPANSION/​AM29LV320DB90ED.html|datasheet]] |
 +^ RAM || 8 MB SDRAM | Samsung K4S641632H-UC75:​ [[http://​www.alldatasheet.net/​datasheet-pdf/​pdf/​118300/​SAMSUNG/​K4S641632H-UC75.html|datasheet]] |